﻿ Java Data Types exercises: Basic Data Types Exercises - w3resource

# Java Data Types: Exercises, Practice, Solution

## Java Data Types Exercises [15 exercises with solution]

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1. Write a Java program to convert temperature from Fahrenheit to Celsius degree. Go to the editor
Test Data
Input a degree in Fahrenheit: 212
Expected Output:
212.0 degree Fahrenheit is equal to 100.0 in Celsius

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2. Write a Java program that reads a number in inches, converts it to meters. Go to the editor
Note: One inch is 0.0254 meter.
Test Data
Input a value for inch: 1000
Expected Output :
1000.0 inch is 25.4 meters

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3. Write a Java program that reads an integer between 0 and 1000 and adds all the digits in the integer. Go to the editor

Test Data
Input an integer between 0 and 1000: 565
Expected Output :
The sum of all digits in 565 is 16

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4. Write a Java program to convert minutes into a number of years and days. Go to the editor

Test Data
Input the number of minutes: 3456789
Expected Output :
3456789 minutes is approximately 6 years and 210 days

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5. Write a Java program that prints the current time in GMT. Go to the editor

Test Data
Input the time zone offset to GMT: 256
Expected Output:
Current time is 23:40:24

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6. Write a Java program to compute body mass index (BMI). Go to the editor

Test Data
Input weight in pounds: 452
Input height in inches: 72
Expected Output:
Body Mass Index is 61.30159143458721

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7. Write a Java program to takes the user for a distance (in meters) and the time was taken (as three numbers: hours, minutes, seconds), and display the speed, in meters per second, kilometers per hour and miles per hour (hint: 1 mile = 1609 meters). Go to the editor

Test Data
Input distance in meters: 2500
Input hour: 5
Input minutes: 56
Input seconds: 23
Expected Output :
Your speed in meters/second is 0.11691531
Your speed in km/h is 0.42089513
Your speed in miles/h is 0.26158804

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8. Write a Java program that reads a number and display the square, cube, and fourth power. Go to the editor

Expected Output:
Square: .2f
Cube: .2f
Fourth power: 50625.00

9. Write a Java program that accepts two integers from the user and then prints the sum, the difference, the product, the average, the distance (the difference between integer), the maximum (the larger of the two integers), the minimum (smaller of the two integers). Go to the editor

Test Data
Input 1st integer: 25
Input 2nd integer: 5
Expected Output :
Sum of two integers: 30
Difference of two integers: 20
Product of two integers: 125
Average of two integers: 15.00
Distance of two integers: 20
Max integer: 25
Min integer: 5

10. Write a Java program to break an integer into a sequence of individual digits. Go to the editor

Test Data
Input six non-negative digits: 123456
Expected Output :
1 2 3 4 5 6

11. Write a Java program to test whether a given double/float value is a finite floating-point value or not. Go to the editor
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12. Write a Java program to compare two given signed and unsigned numbers. Go to the editor
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13. Write a Java program to compute the floor division and the floor modulus of the given dividend and divisor. Go to the editor
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14. Write a Java program to extract the primitive type value from a given BigInteger value. Go to the editor
A primitive type is predefined by the language and is named by a reserved keyword. Primitive values do not share state with other primitive values. The eight primitive data types supported by the Java programming language are byte, short, int, long, float, double, Boolean and char.
BigInteger() translates the sign-magnitude representation of a BigInteger into a BigInteger. The sign is represented as an integer signum value: -1 for negative, 0 for zero, or 1 for positive. The magnitude is a byte array in big-endian byte-order: the most significant byte is in the zeroth element. A zero-length magnitude array is permissible, and will result in a BigInteger value of 0, whether signum is -1, 0 or 1.

15. Write a Java program to get the next floating-point adjacent in the direction of positive and negative infinity from a given float/double number. Go to the editor

Java Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

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## Java: Tips of the Day

How to convert enum value to int?

You'd need to make the enum expose value somehow, e.g.

```public enum Tax {
NONE(0), SALES(10), IMPORT(5);

private final int value;
private Tax(int value) {
this.value = value;
}

public int getValue() {
return value;
}
}

...

public int getTaxValue() {
Tax tax = Tax.NONE; // Or whatever
return tax.getValue();
}
```

Ref: https://bit.ly/2RQCuKA